MAX98357 I2S Class D Audio Amplifier Module

Bring crystal-clear digital audio to your next electronics project with the MAX98357 I2S Class D Audio Amplifier Module. Designed for makers, hobbyists, and engineers alike, this compact unfiltered Class D amplifier delivers efficient, high-quality audio output through a simple I2S digital interface — no analog input stage required. Fully compatible with ESP32, ESP8266, Raspberry Pi, and other popular microcontroller platforms, it's the ideal building block for smart speakers, IoT audio devices, and DIY audio projects.

Key Features

MAX98357 Chip: Industry-proven, high-efficiency unfiltered Class D amplifier IC for clean digital audio output
I2S Digital Interface: Direct digital audio input — no DAC required, minimizing signal noise and component count
ESP32 & Microcontroller Compatible: Works seamlessly with ESP32, ESP8266, Raspberry Pi, Arduino (with I2S support), and more
Unfiltered Class D Output: Up to 3.2W output power into an 8Ω speaker — perfect for portable and embedded audio applications
Wide Supply Voltage: Operates on 2.5V to 5.5V, making it versatile for battery-powered and USB-powered projects
Compact Form Factor: Small PCB module for easy integration into tight enclosures and prototyping boards
Shutdown & Gain Control: Built-in SD pin for enable/mute and gain configuration for flexible audio level management
Low Quiescent Current: Efficient standby power consumption, ideal for always-on IoT audio applications

Specifications

IC: Maxim MAX98357A
Interface: I2S (BCLK, LRC, DIN)
Output Power: 3.2W into 8Ω @ 5V
Supply Voltage: 2.5V – 5.5V
THD+N: 0.015% (typical)
Audio Format: 16/32-bit, up to 96kHz sample rate
Gain Options: 3dB, 6dB, 9dB, 12dB, 15dB (configurable via SD pin)

What's in the Box

1× MAX98357 I2S Class D Audio Amplifier Module

Perfect For

ESP32 / ESP8266 smart speaker projects
Raspberry Pi audio output expansion
DIY Bluetooth and Wi-Fi audio streaming devices
IoT voice assistant hardware (e.g. custom Alexa/Google Home builds)
Embedded audio playback systems

Related Products You May Like

Pair this module with other great components from our store:

Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: What is the MAX98357 I2S Class D Audio Amplifier Module and what does it do?

A: The MAX98357 is a compact unfiltered Class D audio amplifier module that accepts a digital I2S audio signal and converts it directly into speaker-driving power output — up to 3.2W into an 8Ω load. It eliminates the need for a separate DAC, making it a streamlined, low-noise solution for digital audio in embedded and maker projects.

Q: Is the MAX98357 module compatible with ESP32 and other microcontrollers?

A: Yes! The MAX98357 module is fully compatible with the ESP32, ESP8266, Raspberry Pi, and any microcontroller platform that supports I2S digital audio output. Simply connect the BCLK, LRC, and DIN pins to the corresponding I2S pins on your microcontroller and you're ready to start streaming audio.

Q: What speaker can I use with the MAX98357 amplifier module?

A: The MAX98357 is optimized for 4Ω to 8Ω speakers. At 5V supply, it can deliver approximately 3.2W into an 8Ω speaker. It's best suited for small to medium-sized speakers used in portable devices, enclosures, and DIY audio builds.

Q: Does the MAX98357 module require any external components to function?

A: Minimal external components are needed. The module PCB includes the necessary decoupling capacitors and resistors. You simply need to provide a power supply (2.5V–5.5V), connect your I2S audio source, and attach a compatible speaker. No output filter capacitors are required for most applications.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.